Aquarium pump having silencing effect

Details Aquarium pump having silencing effect Aquarium pump having silencing effect

1996-10-29

1998-01-27

Thorpe, Timothy

Pumps

With muffler acting on pump fluid

417412, F04B 3912

Patent

active

057116563

ABSTRACT:
An aquarium pump comprises an air cylinder provided therein with an air admitting chamber, an air inputting chamber, an air outputting chamber, an air discharging chamber, an air winding chamber, and an air cap. As the air cap is actuated, the atmospheric air is drawn into the air cylinder in which the speed of the atmospheric air is reduced by the winding air ducts and the volute air ducts of the chambers. As the air cap is compressed, the air is forced out of the air cylinder via an air output tube without making noise.

REFERENCES:
patent: 3825374 (1974-07-01), Kondo
patent: 4137016 (1979-01-01), Itakura
patent: 4749003 (1988-06-01), Leason
patent: 4792293 (1988-12-01), Wang
patent: 5052904 (1991-10-01), Itakura et al.
patent: 5137432 (1992-08-01), Tsai
patent: 5360323 (1994-11-01), Hsieh

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